Ovipositional Preference and Larval Survival of the Onion Maggot (Diptera: Anthomyiidae) as Influenced by Previous Maggot Feeding

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Onion maggot, Delia antique (Meigen), ovipositional preference and subsequentv larval survival on maturing onion bulbs with different levels of larval feeding and microbial damage were determined. Females preferentially oviposited on onion plants with low to moderate damage compared with healthy or severely damaged plants. Newly hatched onion maggots successfully colonized 90-100% of slightly to moderately damaged bulbs, which were preferred for oviposition, but colonized only 15-20% of the severely damaged and healthy plants. Weight gains for larvae reared on healthy or slightly damaged bulbs did not differ; both gains were greater than for larvae reared on more severely damaged bulbs. Overall larval survival was highest on slightly damaged bulbs. High densities of onion maggots are found on recently damaged fall onions, because they are preferred by D. antique for oviposition and are highly suitable larval food.

Document Type: Research Article

Publication date: April 1, 1989

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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